All data are in degrees Fahrenheit


Water temperature in Holyhead

Detailed information about the current water temperature in Holyhead. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.
Sea temperature in Holyhead now



July 14, 06:08











Day Length:

16 h. 30 min.

Holyhead in July







Sea water temperature in Holyhead today

As of now, in Holyhead, the water temperature is 59.1°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 0.9°F higher than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 59.4°F on 2022, while the historical minimum was 56.8°F on 2015.

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 59.5°F, with minimum temperature starting at 59.2°F, while the maximum might reach 59.8°F.

Daily water temperature in Holyhead

Date Current Year

actual* / forecast**

last year 10 years average
Jun 30 57.1°F 59.0°F 56.6°F
Jul 1 57.4°F 58.8°F 56.7°F
Jul 2 56.9°F 59.2°F 57.0°F
Jul 3 56.9°F 59.3°F 57.1°F
Jul 4 57.5°F 58.9°F 57.2°F
Jul 5 57.5°F 58.9°F 57.1°F
Jul 6 57.4°F 58.9°F 57.2°F
Jul 7 57.6°F 57.3°F 57.1°F
Jul 8 58.1°F 58.2°F 57.3°F
Jul 9 57.8°F 58.7°F 57.4°F
Jul 10 57.6°F 59.7°F 57.6°F
Jul 11 57.6°F 59.8°F 57.8°F
Jul 12 58.3°F 60.1°F 58.0°F
Jul 13 58.9°F 59.8°F 58.0°F
Jul 14 59.1°F 59.1°F 58.2°F
Jul 15 59.2°F 60.0°F 58.3°F
Jul 16 59.3°F 60.2°F 58.4°F
Jul 17 59.4°F 59.8°F 58.5°F
Jul 18 59.5°F 59.9°F 58.6°F
Jul 19 59.5°F 59.0°F 58.6°F
Jul 20 59.6°F 58.9°F 58.7°F
Jul 21 59.8°F 59.2°F 58.9°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Holyhead by month

In an average year, Holyhead offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in Holyhead was recorded on September 7, 2023, reaching a 63.3°F. While the coldest temperature occurred on March 9, 2018, dipping to 43.0°F. The average readings by season are 48.6°F in Winter, 48.3°F in Spring, 57.9°F in Summer, and 57.8°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Caernarfon 60.4°F 19mi
Bangor 59.4°F 21mi
Conwy 60.2°F 33mi
Douglas 58.3°F 59mi
Aberystwyth 62.0°F 66mi

* current water temperature in this city

** straight line distance from Holyhead